Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5240345 | Manhole sealing assembly | — | 1993-08-31 |
| 4927163 | Storm infilteration disk with filter | — | 1990-05-22 |
| 4534378 | Gate valve adaptor | Michael Gagas | 1985-08-13 |
| 4368893 | Manhole infiltration disk and seal assembly | — | 1983-01-18 |